I could have sworn that someone had theirs disabled?

 

I could have sworn that someone had theirs disabled?

That's what I thought, a few of us have aftermarket wheels so not sure if they had transferred the sensor when they were getting their wheels changed.

I'm pretty sure it can be done and they are just being lazy Bs

 

PM ecain63 (Eddie) - he has after market wheels without sensors.

 

Why would you want do that? You can get a set of the TPM sensors for a "subsidized" price at the MB dealership. PT number </span>A 000 905 85 04, in Germany it comes for 173,04 EUR + VAT</span></font>Edited by: RENNtech

 

Unsure of the price in the UK but going by that I'm guessing around £170 - before the cost of removing the tyres (if fitted),fitting sensors / tyres back on and programming!

All the while risking thenew wheels being marked in the process.

 

Mine has been disabled when I fitted the BBS wheels.Indy specialist did it in about 2minutes with the star tool

 

It's a safety feature, not sure if it's wise to get rid of it. Retrofitting the sensors on any aftermarket wheels doesn't require to take the tyre off again, just deflating it, slightly depressing it and replacing the valves with the sensor, done.

 

It's a safety feature, not sure if it's wise to get rid of it. Retrofitting the sensors on any aftermarket wheels doesn't require to take the tyre off again, just deflating it, slightly depressing it and replacing the valves with the sensor, done. 

Appreciate what your saying but its a pain to have to get everything reprogrammed everytime I swap the wheels over and the additional cost. Also I'm not sure how much longer I'll be keeping the car as I sold my GT-R and bought the wife a Macan so the A45 will now be mine once her new car arrives.

 

Not necessary to reprogram anything all the time, this sensor set it plug and play.

 

Not necessary to reprogram anything all the time, this sensor set it plug and play.

If you don't need to program the sensors, how do they know where they are - is there a transmitter / receiver type set up in each corner?

 

Hello:

TPMS learns what sender is comming from each corner by comparing the signals with the rotating spees detected by the ABS sensors on each wheel.
This happens everytime the car is restarted, that's why TPMS is not available immediatly and you need to drive the car a few meters, so the system can confirm where each sender is.
So if you have a second set of wheels, you just have to fit them with compatible sensors (and admit I do not know witch are), and everytime you replace or rotate wheels, TPMS will recognize immediatly the right sender on eatch corner. Clever and with todays technology, it´s also simple.

 

Well drove the car to work this morning for the first time since the service on Friday, and as if by magic the light is out. So looks like one of the Service Techs sorted it out, happy days

 

^ UK Spec A45’s have pressure transducers attached to the valves, so report actual pressures to the receivers, which in turn are displayed in the car. UK A45’s do not utilise the ABS ring to calculate wheel speed.

This is a very old thread.

 

I have a 2014 pre-FL A45. The dealership that I bought it from in Edinburgh put a set of replica AMG cross-spoke rims on it, with no TPMS valves. I have just bought a new set of aftermarket rims (which look amazing! ), but the shop that I went to to install the wheels told me that he didn't think my car has the TPMS, just the ABS low pressure warning system. Is this possible? The TPMS system with wireless sensors on the valves was an option in the UK on pre-FL A45 cars?

This appears to be the case on my car unfortunately. If it is, does anybody know whether it is possible to retrofit this feature? Would it be a case of installing the sensors and updating the firmware on the ECU(s)? Any insights would be much appreciated!

 

See this thread, you need to find out which option code your car was built with:

Tyre Pressure Monitors

My W176 according to the Vin sheet has tyre pressure warning loss fitted (477), yet all four wheels have standard rubber valves fitted ; I hadn't noticed this until I bought a s/h wheel to replace one that had been damaged by hitting a pothole & the s/h rim had a genuine pressure sensor fitted...

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